CN106527984A - Storage method and system used for solid state disk - Google Patents
Storage method and system used for solid state disk Download PDFInfo
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- CN106527984A CN106527984A CN201610944993.7A CN201610944993A CN106527984A CN 106527984 A CN106527984 A CN 106527984A CN 201610944993 A CN201610944993 A CN 201610944993A CN 106527984 A CN106527984 A CN 106527984A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0608—Saving storage space on storage systems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0638—Organizing or formatting or addressing of data
- G06F3/0644—Management of space entities, e.g. partitions, extents, pools
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0673—Single storage device
- G06F3/0674—Disk device
- G06F3/0676—Magnetic disk device
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- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
The invention discloses a storage method and system used for a solid state disk. The solid state disk comprises a plurality of physical pages. The method comprises the following steps of: receiving a data page frame sent from a user; detecting the size of the residual storage space of the current corresponding physical page; judging whether the residual storage space is greater than the data page frame or not; if the residual space is greater than the data page frame, storing the data page frame into the residual storage space of the physical page; and otherwise, marking the data page frame as a double spread page frame, selecting parts of data which has the same size with the residual storage space from the double spread page frame, storing the data into the physical page, and storing residual parts of data in the double spread page frame into a next physical page. By use of the method, the waste of the storage space in the physical page can be avoided, and the space use efficiency of the physical page is improved.
Description
Technical field
The present invention relates to flash memory technology field, more particularly to a kind of storage method for solid state hard disc and its it is
System.
Background technology
With the development of the technologies such as internet, cloud computing, Internet of Things, solid state hard disc is stored as a new generation, extensively quilt
Using.
Multiple Physical Page are included in TLC nand flash, each Physical Page can deposit the data of at least one user
Page frame, but when data page frame is larger so that current corresponding Physical Page not enough accommodates a data page frame (such as one thing again
Reason page can only accommodate 3 data page frames, and remainder not enough accommodates a data page frame again) when, it is remaining in the Physical Page
Part memory space can be filled with invalid data and slattern, low to the utilization ratio in Physical Page space.
Therefore, how to provide a kind of utilization ratio high storage method and its system for solid state hard disc is this area skill
Art personnel need the problem for solving at present.
The content of the invention
It is an object of the invention to provide a kind of storage method and its system for solid state hard disc, can avoid to Physical Page
The waste of memory space, improves the utilization ratio in Physical Page space.
To solve above-mentioned technical problem, the invention provides a kind of storage method for solid state hard disc, the solid-state is hard
Include multiple Physical Page in disk, methods described includes:
The data page frame that receive user sends;
The residual memory space size of the current corresponding Physical Page of detection;
Judge whether the residual memory space is more than the size of the data page frame;
If so, the data page frame is stored in the residual memory space of the Physical Page;
Otherwise, it is cross-page page frame by the data page frame flag, chooses from the cross-page page frame and the remaining storage
The partial data of space formed objects is stored into the Physical Page, by remaining partial data in the cross-page page frame store to
In next Physical Page.
Preferably, include integer ECC Block in each described Physical Page, the ECC Block includes check bit and protected
Data space, the residual memory space are specially the remaining protected data space of each ECC Block in the Physical Page;
It is described that the process that the data page frame is stored in the residual memory space of the Physical Page is specially:
The data page frame is stored in the remaining protected data space;
Described selection from the cross-page page frame is stored to institute with the partial data of the residual memory space formed objects
State in Physical Page, remaining partial data in the cross-page page frame is stored into the process into next Physical Page and is specially:
Choose from the cross-page page frame with the partial data of the remaining protected data space formed objects store to
In the Physical Page, remaining partial data in the cross-page page frame is stored in the ECC Block into next Physical Page successively
Protected data space in.
Preferably, the ECC Block also includes randomization seed and CRC.
To solve above-mentioned technical problem, present invention also offers a kind of storage system for solid state hard disc, the solid-state
Include multiple Physical Page in hard disk, the system includes:
Receiver module, for the data page frame that receive user sends;
Detection judge module, for detecting the residual memory space size of current corresponding Physical Page;Judge the residue
Whether memory space is more than the size of the data page frame;If so, trigger the first writing module;Otherwise, triggering second writes mould
Block;
First writing module, for the data page frame to be stored in the residual memory space of the Physical Page
It is interior;
Second writing module, for being cross-page page frame by the data page frame flag, selects from the cross-page page frame
Take and store into the Physical Page with the partial data of the residual memory space formed objects, will be remaining in the cross-page page frame
Partial data store into next Physical Page.
Preferably, include integer ECC Block in each described Physical Page, the ECC Block includes check bit and protected
Data space, the residual memory space are specially the remaining protected data space of each ECC Block in the Physical Page;
First writing module is specifically for the data page frame is stored in the remaining protected data space;
Second writing module specifically for by the data page frame flag be cross-page page frame, from the cross-page page frame
Selection is stored into the Physical Page with the partial data of the remaining protected data space formed objects, by the cross-page page
The remaining partial data of frame in is stored in the protected data space in the ECC Block into next Physical Page successively.
Preferably, 2-5 ECC Block, the protected data space in each described ECC Block are included in each described Physical Page
Size is 50 bytes.
The invention provides a kind of storage method and its system for solid state hard disc, when the current corresponding Physical Page of judgement
When interior residual memory space is insufficient to store a data page frame, it is cross-page page frame by the data page frame flag, and from cross-page
Choose in page frame and store into current corresponding Physical Page with the partial data of residual memory space formed objects, then will be cross-page
In page frame, remaining partial data is stored into next Physical Page.It can be seen that, the present invention is inadequate again in current corresponding Physical Page
When accommodating a data page frame, it is to avoid waste to remaining memory space in the Physical Page, substantially increase to Physical Page
The utilization ratio in space.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to institute in prior art and embodiment
The accompanying drawing that needs are used is briefly described, it should be apparent that, drawings in the following description are only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can be being obtained according to these accompanying drawings
Obtain other accompanying drawings.
A kind of structural representation of storage method for solid state hard disc that Fig. 1 is provided for the present invention;
Fig. 2 is a kind of schematic diagram of specific embodiment under current storage mode;
A kind of schematic diagram of specific embodiment that Fig. 3 is provided for the present invention.
Specific embodiment
The core of the present invention is to provide a kind of storage method and its system for solid state hard disc, can avoid to Physical Page
The waste of memory space, improves the utilization ratio in Physical Page space.
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
The invention provides in a kind of storage method for solid state hard disc, solid state hard disc, include multiple Physical Page, referring to
Shown in Fig. 1, a kind of structural representation of storage method for solid state hard disc that Fig. 1 is provided for the present invention;The method includes:
Step s101:The data page frame that receive user sends;
Step s102:The residual memory space size of the current corresponding Physical Page of detection;
Step s103:Judge whether residual memory space is more than the size of data page frame;If so, enter step s104;It is no
Then, into step s105;
Step s104:Data page frame is stored in the residual memory space of Physical Page;
Step s105:It is cross-page page frame by data page frame flag, chooses identical with residual memory space from cross-page page frame
The partial data of size is stored into Physical Page, and remaining partial data in cross-page page frame is stored into next Physical Page.
It is understood that the data page frame that user sends is typically of size of fixed, for example, 60 bytes, while solid
The size of each Physical Page is also fixed in state hard disk, for example, can be 136 bytes, as in prior art, data page frame is not
Can cross-page storage, i.e., when the remaining segment space size not enough one data page frame of storage of Physical Page (e.g., less than 60
Byte), the segment space can be wasted, and present invention achieves the cross-page storage of data page frame, in these cases, can be by
A part for data page frame is stored to present physical page in remaining segment space, is then deposited the remainder of data page frame
Store up to next physical page, it is to avoid occur the situation in a large amount of invalid data spaces in Physical Page, improve the storage of Physical Page
Service efficiency.
Wherein, when storing to cross-page page frame, it is first determined the start-stop address of residual memory space, then from cross-page
Intercept in page frame and the isometric one piece of data of residual memory space (typically starting to intercept from the original position of cross-page page frame), and deposit
Enter in residual memory space, then obtain identical with remaining partial data length in cross-page page frame from next Physical Page again
Memory space start-stop address, and remaining partial data is stored in the part memory space.
It is further known that, including integer ECC (Error Checking and Correcting, mistake in each Physical Page
Flase drop is looked into and is corrected) block, ECC Block includes check bit and protected data space, in residual memory space specially Physical Page
The remaining protected data space of each ECC Block;
Process data page frame being stored in the residual memory space of Physical Page is specially:
Data page frame is stored in remaining protected data space;
Choose from cross-page page frame and the partial data of residual memory space formed objects is stored into Physical Page, will be cross-page
The process that remaining partial data is stored into next Physical Page in page frame is specially:
Choose from cross-page page frame and the partial data of remaining protected data space formed objects stored into Physical Page,
Remaining partial data in cross-page page frame is stored protected data space in the ECC Block into next Physical Page successively
It is interior.
It is understood that due to operational characteristic, TLC nand flash compare the wiping of SLC and MLC nand flash
Writing the life-span further reduces, in order to ensure the service life of solid state hard disc, it is necessary to using LDPC (Low Density Parity
Check Code, low density parity check code) mechanism of error correcting code carries out error correction.In this case, in TLC nand flash
Need to include integer ECC Block, except the protected data space for data storage page intraframe data in ECC Block, will also wrap
Include for carrying out the check bit of error correction.Now, data page frame can be stored in each ECC Block successively when being stored in Physical Page
Protected data space (be first filled with an ECC Block, then in remaining data storage to next ECC Block).
Specifically, ECC Block also includes randomization seed and CRC.Here randomization seed is each
The coding of ECC Block.The length present invention of check bit, CRC and protected data space in each ECC Block
It is not construed as limiting, can be according to actual conditions sets itself.
It is understood that due to the differ in size length of the size typically with user data page frame in protected data space,
Therefore just cause, when there is new data page frame to need storage, the remaining protected data space less than to be had in Physical Page and is deposited
In (such as remaining 1/2 protected data space).
The invention provides a kind of storage method for solid state hard disc, the residue in the current corresponding Physical Page of judgement
When memory space inadequate enough stores a data page frame, it is cross-page page frame by the data page frame flag, and selects from cross-page page frame
Take and store into current corresponding Physical Page with the partial data of residual memory space formed objects, then will remain in cross-page page frame
Remaining partial data is stored into next Physical Page.It can be seen that, the present invention not enough accommodates one again in current corresponding Physical Page
During data page frame, it is to avoid waste to remaining memory space in the Physical Page, the profit to Physical Page space is substantially increased
Use efficiency.
Present invention also offers in a kind of storage system for solid state hard disc, solid state hard disc, include multiple Physical Page, should
System includes:
Receiver module, for the data page frame that receive user sends;
Detection judge module, for detecting the residual memory space size of current corresponding Physical Page;Judge remaining storage
Whether space is more than the size of data page frame;If so, trigger the first writing module;Otherwise, trigger the second writing module;
First writing module, for data page frame is stored in the residual memory space of Physical Page;
Second writing module, for being cross-page page frame by data page frame flag, chooses from cross-page page frame and remaining storage
The partial data of space formed objects is stored into Physical Page, and remaining partial data in cross-page page frame is stored to next thing
In reason page.
Preferably, include integer ECC Block in each Physical Page, ECC Block includes check bit and protected data space,
Residual memory space is specially the remaining protected data space of each ECC Block in Physical Page;
First writing module is specifically for data page frame is stored in remaining protected data space;
Second writing module is chosen from cross-page page frame and remaining quilt specifically for being cross-page page frame by data page frame flag
The partial data of protection data space formed objects is stored into Physical Page, and remaining partial data in cross-page page frame is deposited successively
Store up in the protected data space in the ECC Block into next Physical Page.
Specifically, include 2-5 ECC Block in each Physical Page, the protected data space size in each ECC Block is 50
Byte.Certainly, the present invention does not limit the concrete number of the ECC Block that each Physical Page includes, does not limit the quilt in an ECC Block yet
The size of protection data space, the big I in the protected data space are voluntarily set according to the size of user data page frame
It is fixed.
The invention provides a kind of storage system for solid state hard disc, the residue in the current corresponding Physical Page of judgement
When memory space inadequate enough stores a data page frame, it is cross-page page frame by the data page frame flag, and selects from cross-page page frame
Take and store into current corresponding Physical Page with the partial data of residual memory space formed objects, then will remain in cross-page page frame
Remaining partial data is stored into next Physical Page.It can be seen that, the present invention not enough accommodates one again in current corresponding Physical Page
During data page frame, it is to avoid waste to remaining memory space in the Physical Page, the profit to Physical Page space is substantially increased
Use efficiency.
It should be noted that in this manual, such as first and second or the like relational terms are used merely to one
Individual entity or operation are made a distinction with another entity or operation, and are not necessarily required or implied these entities or operate it
Between there is any this actual relation or order.And, term " including ", "comprising" or its any other variant are intended to
Cover including for nonexcludability, so that a series of process, method, article or equipment including key elements not only includes those
Key element, but also including other key elements being not expressly set out, or also include for this process, method, article or set
Standby intrinsic key element.In the absence of more restrictions, the key element for being limited by sentence "including a ...", it is not excluded that
Also there is other identical element in the process including the key element, method, article or equipment.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (6)
1. a kind of storage method for solid state hard disc, includes multiple Physical Page, it is characterised in that described in the solid state hard disc
Method includes:
The data page frame that receive user sends;
The residual memory space size of the current corresponding Physical Page of detection;
Judge whether the residual memory space is more than the size of the data page frame;
If so, the data page frame is stored in the residual memory space of the Physical Page;
Otherwise, by the data page frame flag be cross-page page frame, choose from the cross-page page frame and the residual memory space
The partial data of formed objects is stored into the Physical Page, and remaining partial data in the cross-page page frame is stored to next
In individual Physical Page.
2. method according to claim 1, it is characterised in that include integer ECC Block in each described Physical Page, it is described
ECC Block includes check bit and protected data space, and the residual memory space is specially in the Physical Page described in each
The remaining protected data space of ECC Block;
It is described that the process that the data page frame is stored in the residual memory space of the Physical Page is specially:
The data page frame is stored in the remaining protected data space;
Described selection from the cross-page page frame is stored to the thing with the partial data of the residual memory space formed objects
In reason page, remaining partial data in the cross-page page frame is stored into the process into next Physical Page and is specially:
Choose from the cross-page page frame and store to described with the partial data of the remaining protected data space formed objects
In Physical Page, remaining partial data in the cross-page page frame is stored into the quilt in the ECC Block into next Physical Page successively
In protection data space.
3. method according to claim 2, it is characterised in that the ECC Block also includes randomization seed and circulates superfluous
Remaining check code.
4. a kind of storage system for solid state hard disc, includes multiple Physical Page, it is characterised in that described in the solid state hard disc
System includes:
Receiver module, for the data page frame that receive user sends;
Detection judge module, for detecting the residual memory space size of current corresponding Physical Page;Judge the remaining storage
Whether space is more than the size of the data page frame;If so, trigger the first writing module;Otherwise, trigger the second writing module;
First writing module, for the data page frame is stored in the residual memory space of the Physical Page;
Second writing module, for by the data page frame flag be cross-page page frame, from the cross-page page frame choose with
The partial data of the residual memory space formed objects is stored into the Physical Page, by remaining portion in the cross-page page frame
Divided data is stored into next Physical Page.
5. system according to claim 4, it is characterised in that include integer ECC Block in each described Physical Page, it is described
ECC Block includes check bit and protected data space, and the residual memory space is specially in the Physical Page described in each
The remaining protected data space of ECC Block;
First writing module is specifically for the data page frame is stored in the remaining protected data space;
Second writing module is chosen from the cross-page page frame specifically for being cross-page page frame by the data page frame flag
Store into the Physical Page with the partial data of the remaining protected data space formed objects, by the cross-page page frame
Remaining partial data is stored in the protected data space in the ECC Block into next Physical Page successively.
6. system according to claim 4, it is characterised in that include 2-5 ECC Block in each described Physical Page, each
Protected data space size in the ECC Block is 50 bytes.
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